My subjective assessment and experience from two years ago:
- You need to take several hours for the construction plans, and all adult persons who will live in the house should check the plans down to the centimeter. We checked multiple times. I also recommend doing the complete review on several different days, as "one" is not equally concentrated and focused every day.
- In which direction(s) do doors and windows open. Which leaf opens first and might collide with the shower or bathtub or protrude into them.
- Are the size specifications correct, are the doors and windows drawn in the right shape in the correct place. (For example, a window was drawn in the wrong place for us. In a symmetrical house, that would have looked very bad and nobody else noticed except us.)
- The utility room is also important. Where are boilers, tanks, etc. Can something still be optimized there. For example, in our case, the "equipment" was distributed on more walls than necessary. So every trade had plenty of space, but we are missing a "free" wall.
- I also find the door thresholds important. We decided on "floor-to-ceiling" and assumed that would be virtually "flat." However, we have about an 8cm high threshold on every "floor-to-ceiling" window and on the patio doors.
- Water connections for washing machines, sinks, etc. correctly drawn.
- We did not consult a professional.
If I think of anything else, I will gladly get back to you.
Much joy and success with your building project.